Rock·fish n. Zool. (a) Any one of several California scorpaenoid food fishes of the genus Sebastichthys, as the red rockfish (Sebastichthys ruber).  They are among the most important of California market fishes. Called also rock cod, and garrupa. (b) The striped bass. See Bass. (c) Any one of several species of Florida and Bermuda groupers of the genus Epinephelus. (d) An American fresh-water darter; the log perch.
 Note: ☞ The term is locally applied to various other fishes.
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